Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

JavaScript JavaScript Array Iteration Methods Array Iteration Practice forEach()

Posted by Khumoyunmirzo Nosirov
Khumoyunmirzo Nosirov
8,689 Points

Can Anyone help me

Using forEach, iterate over the numbers array and multiply each number by 10, storing these new numbers in the times10 array.

app.js 
const numbers = [1,2,3,4,5,6,7,8,9,10];
let times10 = [];
numbers.forEach(function(number) {
  times10[number] = number * 10;
});
// times10 should be: [10,20,30,40,50,60,70,80,90,100]
// Write your code below

3 Answers

martinjones1
.a{fill-rule:evenodd;}techdegree seal-36
martinjones1
Front End Web Development Techdegree Graduate 44,824 Points

Use the .push method to insert the values calculated into the time10 array.

const numbers = [1,2,3,4,5,6,7,8,9,10];
let times10 = [];
numbers.forEach(function(number) {
  times10.push(number * 10);
});
// times10 should be: [10,20,30,40,50,60,70,80,90,100]
// Write your code below
David Austin
David Austin
1,217 Points
David Austin
David Austin
1,217 Points 
const numbers = [1,2,3,4,5,6,7,8,9,10];
let times5 = [];
numbers.forEach(function(number) {
  times5.push(number * 5);
});

The above worked for me, what Martin said did not mark the code challenge as correct.

mazen akkari
mazen akkari
19,861 Points
mazen akkari
mazen akkari
19,861 Points 
const numbers = [1,2,3,4,5,6,7,8,9,10];
let times10 = [];
numbers.forEach(number => times10.push(number * 10));